#!/bin/bash

DIR=$(dirname `readlink -f $0`)
. $DIR/../testing.conf
. $DIR/function.sh

echo "Building guest kernel version $KERNELVERSION"

[ -f "$KERNELCONFIG" ] || die "Kernel config $KERNELCONFIG not found"

check_commands bunzip2 bzcat make wget

cd $BUILDDIR

if [ ! -f "$KERNELTARBALL" ]
then
	url=https://cdn.kernel.org/pub/linux/kernel/v${KERNELVERSION:0:1}.x/$KERNELTARBALL
	log_action "Downloading $url"
	execute "wget -q $url"
fi

if [[ $KERNELPATCH && ! -f "$KERNELPATCH" ]]
then
	url=http://download.strongswan.org/uml/$KERNELPATCH
	log_action "Downloading $url"
	execute "wget -q $url"
fi

KERNELDIR=$BUILDDIR/$KERNEL

if [ ! -d "$KERNELDIR" ]
then
	log_action "Unpacking kernel"
	execute "tar xJf $KERNELTARBALL"

	if [ $KERNELPATCH ]
	then
		log_action "Applying kernel patch"
		bzcat $KERNELPATCH | patch -d $KERNELDIR -p1 >>$LOGFILE 2>&1
		log_status $?
		[ $? -eq 0 ] || exit 1
	fi
fi
cd $KERNELDIR

if [ ! -f .config ]
then
	execute "cp $KERNELCONFIG .config" 0
fi

echo "Creating kernel configuration, you might get prompted for new parameters"
make oldconfig 2>&1 | tee -a $LOGFILE

log_action "Compiling the kernel"
execute "make -j5"
